iterating in two arrays in the same for loop - php

Question

I'm learning php and I want to know how to iterate in two arrays in the same for loop? This is the code I have, line 8 to line 14 for example, but it gives an array instead of an element, what to do? please be easy on me I'm still new to this field.
<tr>
<td><?php echo $val->title ?></td>
<td><?php echo $val->content?></td>
<td><?php echo $val->owner ?></td>
<?php } ?>
<?php
foreach ($users as $val) {
?>
<td><?php echo str_replace("-", "%", $val->email) ?></td>
<?php }?>
<?php foreach ($maincat as $val) {?>
<td><?php echo str_replace("-","%",$val->maincat_name) ?></td>
<?php }?>
<?php foreach ($category as $val) {?>
<td><?php echo str_replace("-","%",$val->category_name) ?></td>
<?php }?>
<?php foreach ($sub_category as $val) {?>
<td><?php echo str_replace("-","%",$val->sub_category_name) ?></td>
<?php }?>
<?php foreach ($sub_sub_category as $val) {?>
<td><?php echo str_replace("-","%",$val->sub_sub_category_name) ?></td>
<?php }?>
</tr>
In this image, it gives the whole cells
instead of the two cells {sajeda#sajeda.com and email2} , I want the cell sajeda#sajeda.com to be in the bottom and the other one *email*2 to be above.
This is not an html question, when iterating, I want the first value to be sajeda#sajdea.com and the other iteration to give email2
can somebody help ?
EDIT :
this is how i define users
$data['users'] = $this->model->join_users($table)->result();

Answer 1

I don't know is this what you're looking for?
I used a couple shorthands such as <?=
to replace <?php echo and using foreach(...) : endforeach;
<?php $i = 0; ?>
<?php foreach ($users as $val) : ?>
<td><?= str_replace("-", "%", $val->email) ?></td>
<td><?= str_replace("-", "%", $maincat[$i]->maincat_name) ?></td>
<td><?= str_replace("-", "%", $category[$i]->category_name) ?></td>
<td><?= str_replace("-", "%", $sub_category[$i]->sub_category_name) ?></td>
<td><?= str_replace("-", "%", $sub_sub_category[$i]->sub_sub_category_name) ?></td>
<?php $i++; ?>
<?php endforeach; ?>

Answer 2

result() as $msg):?>
db->select("lastname, firstname,mi")->from("tb_employee")->where("employee_id",$msg->sender)->get(); ?>
<a href=<?php echo base_url() ."mainx/show_msg_id/". $msg->msg_id; ?> >
<?php foreach($s->result() as $t):?>
<div>
<strong><?php echo $t->lastname . ' ' . $t->firstname;?></strong>
<span class="pull-right text-muted">
<em><?php echo date('m/d/Y H:i:s' ,$msg->timestamp); ?></em>
</span>
</div>
<div><?php echo $msg->message;?></div>
</a>
<?php endforeach; ?>
<?php endforeach; ?>
What i do in my example is that i am loop to foreach. On my first loop is the name of employee and in between of my employee loop is the message foreach loop.